next up previous contents ©Marino Gatto and Renato Casagrandi (2020) Models for conservation and management in population and disease ecology

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Problem ER8

In 2003 a population of pink finches in the natural reserve of Greybeeches consists of only three adult reproductive females (from now on called A, B, C). They breed in mid spring. You know that:

  1. Female A produces 7 eggs, of which only 5 hatch; 3 nestlings are female and of them 2 will survive till adulthood and will reproduce in 2004; female A dies in December 2003;
  2. Female B produces 4 eggs, all of which hatch; 1 nestling is female but will not survive till adulthood; female B is still alive in mid spring 2004;
  3. Female C produces 9 eggs, of which only 6 hatch; 4 nestlings are female and of them 3 will survive till adulthood and will reproduce in 2004; female C is still alive in mid spring 2004;
Calculate the individual fitnesses of A, B e C and the finite rate of increase of the population between 2003 and 2004.